<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable
              @click="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级三级权限 -->
              <el-col :span="19">
                <el-row
                 
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag  closable
                  @click="removeRightById(scope.row, item2.id)" type="success">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @click="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
                        {{scope.row }}
                    </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button size="mini" type="warning" icon="el-icon-setting"
             @click="showSetRightDialog(scope.row)" >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible"
        width="50%" @close="setRightDialogClosed">
        <!-- 树形控件 -->
       <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
        </el-dialog>
  </div>
</template>
<script>
export default {
  name: "roles",
  data() {
    return {
      // 角色列表数据
      rolelist: [],
    //控制分配对话框的显示与隐藏   
    setRightDialogVisible:false,
    // 所有权限的数据
    rightslist:[],
    // 树形控件 的属性 绑定对象
    treeProps:{
        label:'authName',
        children:'children'
    },
    // 默认选中的节点id数组
    defkeys:[],
    // 当前即将分配权限的角色id
    roleId:''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      //   把获取的数据赋值给rolelist
      this.rolelist = res.data;
      //   console.log(this.rolelist);
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除

      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }
      // console.log('确认了删除');
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      this.$message.success("删除权限成功");
      // 删除成功 更新当前数据
      role.children = res.data;
    },
    // 展示分派权限对话框
   async showSetRightDialog(role){
      // 获取当前的id值
      this.roleId=role.id

        // 发请求 获取所有权限的数据
        const {data :res} = await this.$http.get('rights/tree')
        if(res.meta.status !==200){
            return this.$message.error('获取权限数据失败')
        }
        // 把数据赋值给rightslist
        this.rightslist=res.data
        console.log( this.rightslist);
        // 获取递归三级节点的id
        this.getLeafkeys(role,this.defkeys)


        // 显示对话框
        this.setRightDialogVisible=true
    },
    // 通过递归的形式 获取角色下 三级权限 的id 并保存到defkeys数组中
    getLeafkeys(node,arr){
      // 如果当前的node 节点 不包含children 属性 则是三级节点
      if(!node.children){
        return arr.push(node.id)
      }

      // 如果是三级节点就用forEach循环遍历
      node.children.forEach(item => this.getLeafkeys(item,arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      this.defkeys=[]
    },
    // 点击为角色分配权限
   async allotRights(){
      const keys= [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys);
      const idStr =keys.join(',') 
      const {data:res} =await this.$http.post(`roles/${this.roleId}/rights`,{
        rids:idStr
      })

      if(res.meta.status !==200){
        return this.$message.error('分配权限失败')
      }
      // 成功的消息
        this.$message.success('分配权限成功')
        // 刷新列表
        this.getRolesList()
        // 关闭弹框
        this.setRightDialogVisible=false
    }

  },
};
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>